Place of origin:
China
Price Condition:
FOB
crossover sub in which the other parts are installed. When backflow occurring, the Arrow will press to valve seat so that the fluid can not flow upwards through the valve. When Arrow falls on the down seat, the circulating of drilling fluid can flow through the valve without pressure loss.
B. Drop-in Check Valve
Drop-in check valve is an internal preventer. When blowout is going to happen, the
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